# energy_low(keV)  energy_high(keV)  fractional_rms  fractional_rms_error
     0.300000          0.460000          0.518406        0.00521941    
     0.460000          0.700000          0.525727        0.00476467    
     0.700000           1.00000          0.567357        0.00634981    
      1.00000           1.54000          0.659515         0.0123132    
      1.54000           2.40000          0.698775         0.0180523    
      2.40000           4.80000          0.598777         0.0285713    
      4.80000           10.0000          0.425178         0.0475237